依次填入下列各句横线处的词语，最恰当的一组是（    ）
①这件事让他和他的事业遭受了沉重的打击，为什么会产生这样的结局，其中           只有他自己明白，别人无从知道。
②巴以冲突再次升级，美国国务卿赖斯紧急赶往耶路撒冷，会见巴以双方领导人，从中          ，以平息可能重新恶化的局势。
③黑龙江省食品药品监督管理局市场监督工作人员提醒人们，不要听信治疗肿瘤广告的宣传和误导，否则，不但           不了疾病，反倒耽误治疗时机。
④活塞队主帅桑德斯在与爵士之战的第三季因与裁判争论被           出场。本场比赛活塞队93：103不敌爵士队结束二连胜。

在（2）的条件下，将△DEF沿DF折叠，点E落在FA的延长线上的点G处，连接CG，请你在图3的位置画出图形，并求出sin∠CGF的值

如图所示，匀强磁场与圆形导体环平面垂直，导体ef与环接触良好，当ef向右匀速运动时(　　)

Flat A：Lovely double bedroom with own store space in the house, garden, garage(车库)and parking space. 5 minutes to the library,18 minutes to the bank. TV broadband available.
115 pounds per week including all the bills. Four weeks rent(租金)，four weeks deposit(押金)required．
Tel：07912100237
Flat B：A double room available to rent at￡420 per month in a 2-bedroom new apartment located in London. It's ideal for students (5 minutes to University of Greenwich, Avery Hill campus) and professional people for short term. 2 minutes walk to the train station and local town centre. There are fast trains to London Bridge(15 minutes)and Cambridge Cross Station(20 minutes)in London.
There are public buses to Cambridge, Greenwich etc.
Features: entrance hall, modem kitchen and bathroom, living room and parking space.
Tel: 17912100273
Flat C：Shared flats available for rent, weekly￡80 including breakfast and dinner；daily￡20 including breakfast. Wireless(无线) Internet is provided for free. Central location in London, ideal for holiday makers and students．
Tel: 0791 2305237